January Weather in Jamestown, United States

Last updated: June 24, 2025

In Jamestown, United States, the average temperature in January hovers around -1°C (31°F), with minimums plunging to -26°C (-14°F) and soaring to maximums of 21°C (70°F). Expect 79 mm (3.1 in) of precipitation spread over 9 days, accompanied by a high average humidity of 88%.

January Temperature in Jamestown

In January in Jamestown, the average temperature is -1°C (31°F). The maximum can reach 21°C (70°F), while the minimum can drop as low as -26°C (-14°F). Travelers should be prepared for a wide range of temperatures, from chilly to surprisingly warm, depending on the day.

January Weather in Jamestown: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Jamestown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jamestown, January typically has an average temperature of -1°C (31°F), with highs reaching up to 21°C (70°F) and lows dropping to around -26°C (-14°F).

Data source: Temperature data for Jamestown generated using information from the Copernicus Climate Change Service.

January Precipitation in Jamestown

In Jamestown in January, the precipitation amount is 79 mm (3.1 in) spread over 9 days.

January Precipitation Trends in Jamestown

The chart displays monthly precipitation patterns in Jamestown, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Jamestown, January typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Jamestown

In Jamestown in January, humidity is 88%. With an average temperature of -1°C (31°F), this humidity feels like a biting cold that penetrates your clothing, making outdoor exploration challenging and the air clingy, adding an extra chill that can make you feel even colder than the temperature suggests.

January Average Humidity in Jamestown

This chart illustrates the average monthly humidity levels in Jamestown, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Jamestown is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Jamestown

In Jamestown in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Jamestown, you can check the information here.

Maximum UV Index Levels in Jamestown for January

The chart shows the monthly maximum UV Index (UVI) for Jamestown in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Jamestown typically reaches 3, which falls under the moderate exposure category.

Data source: Jamestown January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Jamestown Compares to Other Months

Weather in Jamestown varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Jamestown, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Jamestown, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	79 mm (3.1 inches)	88%	moderate
February Weather	1°C (35°F)	111 mm (4.4 inches)	88%	moderate
March Weather	6°C (43°F)	116 mm (4.6 inches)	87%	high
April Weather	11°C (52°F)	111 mm (4.4 inches)	85%	very high
May Weather	18°C (64°F)	125 mm (4.9 inches)	81%	very high
June Weather	22°C (72°F)	135 mm (5.3 inches)	82%	very high
July Weather	24°C (76°F)	114 mm (4.5 inches)	81%	very high
August Weather	23°C (74°F)	87 mm (3.4 inches)	73%	very high
September Weather	21°C (69°F)	91 mm (3.6 inches)	73%	very high
October Weather	14°C (58°F)	95 mm (3.8 inches)	78%	high
November Weather	6°C (42°F)	98 mm (3.9 inches)	89%	moderate
December Weather	2°C (37°F)	102 mm (4.0 inches)	87%	moderate